Abstract: A butterfly valve assembly includes a unitary flow body and a unitary valve element. The unitary valve element is rotationally mounted within the flow body and includes a rotationally mounted shaft and a butterfly plate that is formed integral to the shaft. The butterfly valve assembly can withstand the maximum drive torque supplied from an associated actuator, while at the same time meeting a desired level of flow performance, and allows the unitary valve element to be installed up through the pilot bore.

Abstract: A pressure relief valve includes a lever plate, a first spring, a fitting, and a guide assembly. The fitting has a first side, a second side, and a flange having a rounded end and includes a surface with which a first end of the first spring contacts. The guide assembly has two sides, two concavities, and at least a portion of the guide assembly extends through the opening of the lever plate, the first concavity is formed on the first side of the guide assembly and contacts the fitting flange rounded end, and the second concavity is aligned coaxially with the first concavity. A rounded end of a rod of the diaphragm assembly contacts the second concavity. The second spring is adapted to supply a second force against the diaphragm assembly to move the lever plate in a second direction that is substantially opposite the first direction.

Abstract: A butterfly valve assembly includes a unitary flow body and a unitary valve element. The unitary valve element is rotationally mounted within the flow body and includes a rotationally mounted shaft and a butterfly plate that is formed integral to the shaft. The butterfly valve assembly can withstand the maximum drive torque supplied from an associated actuator, while at the same time meeting a desired level of flow performance, and allows the unitary valve element to be installed up through the pilot bore.

Abstract: A pressure relief valve includes a lever plate, a first spring, a fitting, and a guide assembly. The fitting has a first side, a second side, and a flange having a rounded end and includes a surface with which a first end of the first spring contacts. The guide assembly has two sides, two concavities, and at least a portion of the guide assembly extends through the opening of the lever plate, the first concavity is formed on the first side of the guide assembly and contacts the fitting flange rounded end, and the second concavity is aligned coaxially with the first concavity. A rounded end of a rod of the diaphragm assembly contacts the second concavity. The second spring is adapted to supply a second force against the diaphragm assembly to move the lever plate in a second direction that is substantially opposite the first direction.